Plow attachment



Feb.3, 1931. H. c; GRAWUNDER' 20 I now umcmwnw Fil ed Feb. 14, 1950 2 Sheets-Sheet 1 I Inventor C: 4 g/wn/una er q By I A iiorney Feb. 3, 1931. H. c. GRAWUNDER PLOW ATTACHMENT Filed Feb. 14, 1930 2 Sheets-Sheet 2 Inventor M 6, gran/ana er A ttorncy Patented Feb. 3, 1931 UNITED STATES HENRY C. GRAWUNDER,

F BELLEVILLE, TEXAS PLOW ATTAcnMENT Application filed February 14, 1930. Serial mine 117.

This invention relates to a supplemental appurtenance in the nature of an attachment for what is generally known as a tractor plow.

A tractor plow structure such asis shown in Patent- 1,719,74l8 granted to R. J. Altgelt et al, constitutes the primar part of thein-.

vention, but the novelty is founded upon a supplemental attachment which is 'LISGCllil association with the plow structureto permit the patentcd'plow structure to have the additmnal function of slmultaneously terracing and ditching the ground.

It follows thatthe fundamental novelty of V the present appiication is predicated upon an appliance used'in conjunction with the pat ented plow above ment oned, the improvements being in the nature of an attaching bar member, and an additional concavo-convex disc cooperating with one of the plow discs on the existing tractor plow.

Briefly stated, the attachment comprises a pivotally mounted bar having its outer end.

ofiset laterally in an upwarddirection and a forward direction to properly locate the concavo convex disc which is mounted thereon. The purpose 01" this arrangement is to elevate supplemental discs to accomplish the desired terracing and ditchingot' the ground covered.

In the drawings: i

Figure 1 is a top plan View showing the old tractor plow characterized by the sup-- plemental improvements" as constructed in accordancewith theipresent invention.

Figure 2 is a sectional view taken approximately on the plane of the line 22 of Figure 1. x V 1 Figure 3 is a perspective View of the extension arm or bar. i

Figure 4 is a perspective view of a strength ening brace. r

In the drawings 1 I character 5 dcslgnates the tractor having atcaching devices (S'fashioned to support a shaft 7 carrying a substantially U-shaped frame 8. T his frame lSlOCkElblY mounted on the shaitt 7 and includes spaced. parallel arm port1ons 9 and 10 respectively together with a, lifting obtain a clear understanding of the invention lever 12 and a connecting link 13. In the patented device 111ent1o11ed,there is a concaveconcavo-convex disc 23 is attached.

11 Figure 1.,the reference convex disc 14 held'in place by an approprithe forward'arm 9. 1 i

ate attaching bracket 15 suitably fastened to v v In accordance with the present invention,

I provide an. extension armlo. This is pivotally connected by a bolt 17 with the arm 9.

In" addition, this arm 1'6is of aipeculiar configuration. Referring for instance w Figure 3,-it will be seenthat it is in the nature'of a flat metal strip "of appropriate metalhaving an inner end portion 18 provided with an arc'uate keeper notch 19. .This "notch 1000perates with a headed "bolt'2 O carried by the arm19.

The intermediate portion .21 of the arm is laterally. nset: in a rearward and upward 'd1rect1on,th1srormmg a suitably ofi'set outer end portion 22 on which the supplemental The meral 24 designates a diagonal brace, one end of which is fastened to the free endportion of the "arm 10, and the opposite end of which is bolted to the laterally offsetend'portion 22 of the extension arm 16. U 7 It will be evident that the principal novelty in the improved arrangement is in the utiliza- .tion' of apair of complem'ental plow discs 14 and f2?) respectively,whereinthe disc 14, is disposed ina normal plane and the discy23j elevated with respect thereto as seen in Figure;

2. The peripheral portion of the disc 23'is' arranged in close proximity to and in fact in I overlapping relationship with. the corre-; sponding portionof the disc '14 and this'provides for the difference in elevation in treatmg the aroundand nrformmgthe terrace and the ditch.

The entire tram-e Sis susceptible of vertical swinging action onthe pivots and this is accomplished by operating thelever: 12. The

disc 23 andits at achmentsmove as a unit I with the frame 8.. However, the d1scj23 has 7 independent movement becausethe 'arln 16 his thought that persons skilledin the art to which the invention relates will be ableto after considering the description inconnecis pivoted at 17 for this purpose, thusallowy above said front plow disc.

2. In a terracing and ditching plow of the class described, a mobile support, a stationary axle mounted thereon, a substantially U- shaped frame rockably supported on said axle, means for raising and lowering said frame, a concavo-convex plow disc mounted on the front arm of said frame, an extension arm carried by said front arm and extending; outwardly and rearwardly. and a second concave-convex disc carried by said extension arm.

3. In a machine of the class described, a mobile support, a horizontal axle mounted in a substantially diagonal position on said support, a substantially Ill-shaped frame rockably supportedon said axle and having spaced parallel arms extending rearwardly in a direction substantially oblique to the line of draft, means for raising and lowering said frame, a plow disc supported on the front arm. of the frame, a second plow disc supported on said front arm and located in a plane above said first named plow disc and having its peripheral edge portion overlapping the corresponding; portion of said first named disc.

4;. In a structure of the class described, in combination, a tractor, a horizontally disposed shaft mounted thereon, a'substantially Ll-sliaped frame rockably mounted on said shaft and disposed in a rearwa-rdly inclined directioma plow disc rigidly fastened on the forward-arm of said frame, an extension arm pivotally mounted. on said forward arm and extending in an outwardly and rearwardly inclined direction, and a second plow disc mounted on the outer end portion of said extension arm, said outer end portion being of set upwardly and laterally to dispose the second disc in an elevated position with respect to the ground and with respect to said first named disc, the peripheral edge portions of said discs being disposed in spaced overlap ping relationship.

5. A tractor plow attachment of the class described comprising an extension arm havadjacent keeper notch in its upper edge, the outer end portion of said arm being ofiset laterally'and upwardly, a concavo convex HENRY C. GRAWUNDER. 

